Lifting-truck.



U. E. M. MILLER.

LIFTING TRUCK.

APPLIOATION FILED JUNE 6, 1913' Patented July 21, 19m

2 SHEETS-'SHEET 1.

awe/mica.

G. E. M. MILLER.

LIFTING TRUCK.

APPLICATION FILED JUNEG, 1933 Patented July I an object to hetransported a'ndlthen' ele-I; iiit'ed so asto lift thebbjebtotf'the'floor in "ei'dr thatit ciin bebtinveriient-lfiiiqvedf yMymvmionrem that class (if lifting tru ck' ih which the hen the serves:aie'ver so' the t. when pulled f6 waid and depressedflt. aetuziteS thelifting ineg'z'hani'sni' and Specifice'tioh (if Letter; Patent.

raises theebjje et orfar tieletdi LIFTING-TRUCK.

frttme elevated ahd locked. Fig, 8 is a view similar to'Fig. 7 but is athe parts actuated was, t6 release the inching device, preparaftm ytodropping the topframe, and Fig. 9

is a rear el vation of the true-k.

The tr'nck i s previded with main or lower frame 10 which at the rearend is noi nted pn wheels 11 snppm'ted en an axle "12,-z'md at the frontend the main frame is iflaiised slightly as show n at 10" aiid'pi'ovidedn-withewheels 1.3 whieh ie'joui haied in swivel foi'lisfl h; likeoidinary' eesters, 59 as te per- "I'nittlie iti'nch ,to be, feedily tain-led, The lower fi' aine islprbvided with inclined parts l'fifaiid theupper flame 161125 a top 17 and inclined parts 18 which iideen theinclined b'e 'tneved. 'An'bbjectiori to' some of the? pagft'lS of thelower lramgsolthat whenthe 'ttfncks off'thi cla'ss is that \v'l'iilethehandle serve as a lever, itfi's awkward in eertain 2o waysfandespecially 'becau'se it cannot he. 7 'mbved ifeelyavith oiit iiflecti gtlie loadjinf; moving thetrnck from place to place. 4 The object of myinvention tppro'dnce a: truck Of this class in whieh the hahdleserves,as' ailevei"t ohpei'ate tlielifting mechanism; biitinhvliieli asiinp'le'device isnsed 1901 f eering the handle'so'th'at it can be njdved freely:w'it-hoiit 'afiecting' the'loir d and iillllS facil tiite the" fi'ndlingof the triiel Another'ohject' of my inveniibn ie ti.) p1" dnce sil'hpleand reliable locking inehaurely in a i elevated pdsition; biit'whijeh'ean be easily iele:'1sedby' 'a movement .O't .jthe

handle or'leverf v l'mother'dbjeet (it my in ventibn is't'o'inake thetruck 'as simple'as possible, t6 the ,end that strength and utility canbe sn'b'seivedL Reference is to behad tofthe'aecoinphn y- 4Ging'di'awiligs forming a part (if this specie indieate eoi'i'epouding pai'ts in all the "views. I I

1 i'nay'he raied, which handle bar aiso serves upper frame is pulled fbward, the inelines ISWvill/slide npohthe'inelihee i5, and the t'oplfmmeahd its lead will be raised. There is nothing new about thisfirrgzngeinent, and

so' it is not'shown in great detail. The top frame. is provided with astep 19 'at' its fi'oht' edge tb' prevent the load from sliding forwardand in'teizfei'ing with the working parts. llie'ti'ligdgdias a'leverhandle at. its fi'OIit'endQand this handle is prefei'a hly pi'ov idedwith a yoke having secket ll' lmbel's 20' which arec'onnected by a crossbib-21, and in whit-h the handle inembeis 22;:1re'fiked. The socketmembers 20 fire eeenred te Shaft 23 which is jo'ui'naled in the lnainframe as shown Fig 2. ()hvi- '(msly' the detail of the handleconstructien 'cin he dep aited'fidin without affecting the invention. v

1 The socket tinenihers 20 of the handle Me longitudinally sletted asshown at 2%, edits to receive "a ldeking' hai' which can 'he nn'ive'd up'and down in the sieteM, iind jwhich projectsthrough the ends thereof,the decking bhihaving'a handleQG by which it nd pulling on the link"connection with the top frame 16, will pull the frame forward so thatit will slide upward on its inclines 18, and be elevated. ,The frame islocked in the elevated position as hereinafter "described. Now, afterthe frame, 16 has been raised and locked, the lockinEbai-mm bepulled outof engagement with the arms 28 and then the handle comprising the parts20, 21 and 22, can be'freely moved up and down to handle the truck,without danger of interfering with the working parts of the truck. Thisis agreatadvantage, because it is necessary to move the handle up anddown and in .various' positions in handling the truck efficiently. Whenthe load is to be moved up or down, the locking bar 25 is placed inengagement with the arms 28.

The locking and releasing mechanism for the movable frame 16 is shown"in-Figs. 6.- to 9. The frame 16 is provided with shoulders 34 and 35,these being located on the sides of the frame, and they are engaged by Ia pawl 36 which as shown is in the form of a cross bar having arms 37which are ivoted on the rear axle 12 of the truck. I W en the movableor'top frame 16 is depressed, the pawl 36 is in engagement with the for-I ward and upper shoulder 34, as shown in Fig. 6, and the frame can notdrop fartherthen however, the movable frame 16 is pulled forwardto'raise its lead, the pawl 36 drops behind the shoulders 35, and the itop frame is thus lockedin its elevated position.

' The arms 37 of thepawl 36 have depend -1ng' or 'extension ends 88which dro below 'theaxle 1'2, and which are pivota lv'conne'cted asshown at 89 with the slotted links 40, and these ride on a stud 41 onthe frame 16. When the frame; 16 is pulled forward and upward,-the.stud41 will be nearly to the front end of the slots in the links 40, asshown in Fig. 7 If, now, the frame is pulled a little farther, the stud41 will pull on the links/l0 ands'o on the extensions 38 of the arms 37and this will'raise'the awl 36 out i of engagement with the shoul er35,this bein easily effected because the slight forwar movementof the topframe will release the shoulder from frictional contact with the pawl36. When the pawl is raised as just deseribed, an elbow dog 42 which ispivoted on the-stud43 justbehind the pawl. 36, swings,beneat hthepawltand holds it above the shoulder 35 .as-shown-s elearly in Fig.8, and then the top frame 16 can slide back to its depressed positionshown. in Fig. 6, and deposit its load; h

It will be, seen from the foregoing description that the strueturelwhichI have shown and deseribedis very simple, that the movable frame can beeasily operated by the leverhandl'e, that the. handlecan be easilyreleased from the locking mechanism, and

Lioness that a very simple means is employed for locking and releasingthe movable frame of thetruck. I It will be further observed that thehandle'when in engagement with the arms 28, acts as a lever to raise'and lower the movable frame, but that the handle when released, simplyserves as a handle for moving the truck. and for no other purpose. It

is not, however, necessary to release the bar 25 in orderthatthe handlemay be used for.

ordinary purposes of moving the truck, as it can beused in the regularway, because the link connect-ion between the parts 28 and the to frame,being a loose connection, provides or a'good deal of freedom ofmovement;

1. A lifting truck comprising a wheeled main frame, a top frame mountedon the main frame and arranged to rise and fall when movedlongitudinally on the main frame, swinging slotted arms pivoted on themainframe, a link connection between the arms and the top frame, a leverhandle mounted on themain frame near the afore said arms, said handlehaving a cross-bar v and a lo'cliin g bar slidable on the handle, saidlocking bar beingadapted to enter the slotted arms and having anabutmentthereon to engage the cross-bar .of the lever handle. I 2. Alifting truck comprising a main wheeled frame, a top frame movable upand down on the main frame,'said top frame being provided withaplurality of abutments' or shoulders, a swinging pawl pivoted on themain frame and adapted to engage the aforesaid-shoulders or abutments,means for releasing the pawl from the shoulders or abutments by amovement of the top frame, and automatic means for holding the pawl outof thepath of one of said abutments.

3.' A lifting truck comprising a main wheeled frame, a top framearranged to slide longitudinally and vertically on the main frame, saidtop frame being provided means for moving the top frame longituedinally, a pawl pivoted on the main frame and adapted to engage .theaforesaid shoulders, and a link connection-connected to the pawl and tothe top frame, whereby excesslve movement of the top frame will tilt thewith a plurality-of shoulders spaced apart,

gagemem with said. shaulfiers, said pawl having a lower extczision behimpivoiz, link connection'b'ei' em said iaensx'on and the top frame, and adog pivo ied behind film paw]; and adapted to swing into engagement Wibhthe pawl when file latter is missed.

5. A lifting truck comprising a main wheeled frame, a tap frame movableup and down on ths main frame, said top frame being provided WM:plurality of abutments 01' shuulders, 1 swinging pawl pivoted on themain frame. and adapted to engage the aforesaid :sixoniders orabutments, and means for releasing pawl from the shoulders or umtmentsby the movement of the top 15 CARL E. M. MILLER.

Wltnessesz WARREN B. I'IU'IGHINEON, Airman; G. .UANNEL J,

